287-booster
About the 287-booster PCB
287-booster is an open source PCB design by necroware, published on GitHub under the CC-BY-SA-4.0 license. It is a 2-layer board measuring 24.9 × 51.6 mm, with 4 components from 4 distinct parts.
Other key parts include the 80287 and Socket. By type, the board carries 2 ICs, 1 connector and 1 resistor.
From the project
Interposer for 287 FPU with clock mode jumper
This is an interposer which adds a jumper which can be used to select the clock divider on a 287 floating point unit. It was designed and open sourced in cooperation with the user i440bx from the German dosreloaded.de community.
Intel 287 co-processors have configuration pin 39 for the clock mode signal (CKM) setup. When this pin is pulled up the chip will use the clock directly. If it is pulled to ground the chip will use a clock divider. The pin has internal pull-down resistor, so it can be left unconnected, which will default the setting to divided clock. Which divider will be used…
Main components on the 287-booster
287-booster bill of materials (BOM)
4 components, 4 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 80287 | DIP-40_W15.24mm_Socket | U1 |
| 1 | Socket | DIP-40_W15.24mm | U2 |
| 1 | Conn_01x02_Female | PinHeader_1x02_P2.54mm_Vertical | J1 |
| 1 | 10K | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1 |
287-booster design files
The KiCad project lives in the necroware/287-booster repository on GitHub; these links point at the commit this page was built from.
- Layoutkicad/287-booster.kicad_pcb
- Schematickicad/287-booster.kicad_sch
287-booster: common questions
How big is the 287-booster PCB?
The 287-booster measures 24.9 × 51.6 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the 287-booster?
4 components, from 4 distinct parts. The full bill of materials is listed on this page.
Where can I download the 287-booster design files?
From the necroware/287-booster repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the 287-booster design in my own project?
Yes, under the terms of its CC-BY-SA-4.0 license, which necroware chose for the repository.